Spotted it
I too prefer the first one (its brought the car detail out lovely) but the bg etc is a little too overcooked for me (thats just my opinion).
Quick suggestion, if you not mind, Graham..... Create two separate HDR files - one with the car as you have it, and another for the background, but tone it down a bit, then merge the two together - hopefully you get best of both worlds.
It been mentioned before, and I tend to agree, but greens and yellows with HDR for some reason go manic. Would you mind posting the original photo (not hdr'd) would love to have a little play around with it....
PS, Graham.... <whispers> I got 07 reg focus.... lovely cars aren't they... LOL